Mobile Engineer

Responsibilities

• Own the Fin mobile app across iOS and Android using React Native, from architecture to implementation and polish.
• Design and implement flows that make sending, receiving, and managing money feel simple and trustworthy for everyday users.
• Help design secure account and custody patterns that can scale to handle meaningful balances and real world usage.
• Collaborate with design and product to prototype, refine, and ship new features quickly.
• Maintain a high bar for code quality through thoughtful architecture, code review, and testing.
• Work with backend and infra engineers to integrate APIs, payments, and identity or security features into the mobile app.

Qualifications

• 3+ years of experience building and shipping mobile apps in React Native.
• Deep familiarity with the Expo ecosystem and modern mobile build pipelines (EAS).
• Strong product sense and attention to detail in UI and UX, especially for consumer facing apps.
• Solid understanding of mobile app architecture, performance, and offline or edge cases.
• Ability to work independently, set priorities, and drive projects from idea to shipped.
• Strong communication skills and comfort collaborating with design, product, and backend teams.
• Interest in payments, fintech, or crypto.

Bonus Points

• You have shipped an app from concept to production in a small team or as the primary developer.
• Experience in EITHER traditional consumer fintech apps (neobanks, peer-to-peer payments) OR mobile crypto wallets (Solana, non-custodial, etc).
• Experience with cloud platforms such as GCP or AWS.
• Experience deploying smart contracts on Solana or integrating with blockchain based systems.
• Background in security, threat modeling, or penetration testing, especially for consumer finance products.